fix(rss): RSS feed respects sitemap-disabled pages

[srgg]

🚀 What type of change is this?

• [x ] 🐛 Bug fix (A non-breaking change that fixes an issue)
• ✨ New feature (A non-breaking change that adds functionality)
• 💅 Style change (A change that only affects formatting, visuals, or styling)
• 📚 Documentation update (Changes to documentation only)
• 🧹 Refactor or chore (A code change that neither fixes a bug nor adds a feature)
• 💥 Breaking change (A fix or feature that would cause existing functionality to not work as expected)

---

🎯 What is the purpose of this change?

The default RSS feed in Hugo Blox Kit does not respect the frontmatter flag sitemap.disable. As a result, excluded pages can appear in the RSS feed, which is inconsistent with the sitemap and may unintentionally expose content.

This change updates the RSS layout to exclude sitemap-disabled pages, ensuring the feed only contains indexable content.

---

📸 Screenshots or Screencast (if applicable)

Not applicable

ℹ️ Documentation Check

• [ x] No, this change does not require a documentation update.
• Yes, I have updated the documentation accordingly (or will in a follow-up PR).

---

📜 Contributor Agreement

Thank you for your contribution!

• [x ] By checking this box, I confirm that I have read and agree to the HugoBlox Contributor License Agreement (CLA).

[netlify]

✅ Deploy Preview for academic-demo canceled.

Name	Link
🔨 Latest commit	577788e
🔍 Latest deploy log	https://app.netlify.com/projects/academic-demo/deploys/69d568eeec2aba0007c60015

[github-actions]

Wow, your first PR! Welcome to the community! 🎉

Thank you for this contribution to open source and open research. It makes a huge impact for the thousands of innovators building with Hugo Blox.

If you're wondering about next steps, please read our Contributor Guide for coding standards, how to run the project locally, and how to get help.

We hope this is just the start of your journey with us. Let's build the future together! Join us on Discord to connect with the team and community.

Awesome work, we'll take a look soon! ✨

[gcushen]

Thanks for the PRs and for identifying that private pages can leak into the RSS feed - that's a real gap we'll fix.

However, HugoBlox uses its own private: true frontmatter param (rather than Hugo's newly added sitemap.disable inspired by private) to control page visibility across all surfaces (sitemap, RSS, 404 suggestions, search engine indexing). This is by design - it's a simpler, flatter param that's more intuitive for our audience.

We'll fix the RSS feed to respect private (which was missing). Supporting Hugo's suggested sitemap.disable as an additional mechanism would be a new feature rather than a bug fix, and we'd want to evaluate that separately as that would add unnecessary bloat and confusion for our community.